Re: Entertainment system pen testing
Let me guess, you drive an Audi?
The radio has a speed-dependant volume (marketed as gala effect), so it has a speed pulse input. Being German, they work natively in SI units.
The first generation of it used a dedicated pin that delivered a pulse, the frequency of which indicated the speed. Later iterations used the CAN bus which also negated the need to enter a PIN after changing battery etc as it keyed itself to the serial number of the dash ECU.
Biting the hand that feeds IT
